If you can even find it, it sounds virtually impossible to attack this thing. Even if you manage to get past the outer layers of defense, it's then got explosive reactive armour. The T-90M has a very advanced 125mm gun and a new computerised fire control system. This whole trove of information will help not just in defeating Russian tanks during this invasion, but also in any future wars in which Russian vehicles are likely to be involved. It really will have ripples spreading out into the future.